Rotatable spindle.



u J. V. GUNNIFF.

ROTATABLE SPINDLE.

APPLIoATIoN FILED Nov. zo, 190s.

920,830; Patented May 411909.

UNITED sTA'rEs RATENT oEEIoE.

JOHN v. oUNNIrE, OEEALL RIVER, MAsfsn'cnUsErTs, AssreNoR To DRAPER ooMrANYQor HOPEDALE, MAssAonUsE'rTsA CORPORATION or MAINE.

ROTATABLE srrnnLn.

No. 92o,83o.

`Specification of Letters Patent.

Patented May 4, 1909.

" Application ined November 2o, 190s. serial No. 463,685.

To all whom it may concern.'

it known that I, vJOHN V. CUNNIFF, a citizen of the United States, and resident of hall River, county of Bristol, State of Massa-V chusetts, have invented an Improvement in Y Rotatable Spindles, of which the following brational movements of. the spindle'due to an unbalanced load will be prevented and the spinning or twisting operation improved. The drawing shows in side elevation and partial section a suflicient portion of a rotatable spindle and its bearing, with one embodiment of my invention applied thereto.

The spindle 1 having an attached sleevewhirl 2, and the depending rigid pintle 3 of the spindle, may be of substantially well known construction, except that iv have shown the spindle as annularly shouldered at. 4, and the extremity of the pintle is screwthreaded at 5, see dotted lines, for purposes to be describe l The bolster-case 6, adapted to pass throughthe spindle-rail R, is adapted to contain a lateral bearing or bolster 7, of any suitable character and forming no part of my present invention, but herein 'I have shown the lower end of the case 6 as open, to receive therein with a tight or drivin fit a short sleeve 8. This sleeve has lixed y secured to it the lower end Aof a tubular spindle-step 9,

extended upward within the casing, the anV nular shoulder 4 of the spindle seating upon the upper end of the step, to vertically support t 1e spindle. n

The spindle pintle 3 passes freely through the tubular step and rojects beyond its lower end, as shown, an upon the threaded part 5 is screwed a steadying member, herein shown as a circular plate 10, made of metal, and secured in place by a check-nut l 1.

A slight clearance is provided between the step 9 and the intle 3 in order that the latter can move free y laterally for a limited distance, this freedom of movement being pro vided to enable the spindle when running at speed to iind its true center of rotation.

This centering, however, is greatly assisted and the spindle more rapidly and accurately centered when running under an unbalanced load by means of the steadying member 10, which by its weight and its location at the lower end of the spindle always tends to maintain the proper centralization of the spindle.

l The oil in the case 6 will collect between. the step 9 and the wall of the case, and is prevented from leakin at the bottom of the latter by the tight fit between the case and the sleeve 8, and between the latter and the ste so far as the invention is concerned the step and sleeve may be made separate and iitted together or they may be made integral one with the other.

The size of the steadying member, and its weight, may be varied according to circumstances, to properly cooperate with the spindle and perform the desired functions,

.suclrvariations depending upon the spindle speed, load, etc.

`lhen it is desired to remove the spindle or to change the lateral bearing or bolster the steadying member can bereadily detached and the spindle can then be withdrawn from the case.

Having fully described my invention, what I claim as new and desi-re to secure by Letters Patent is 1. A bolster-case open at its lower end, a bolster located in the bolster-case, and a rotatable spindle laterally supported by the bolster, combined with a tubular, vertical support for and through which the depending end of the spindle freely extends, said support being fiXedly held in the lower end of the bolster-case, and a steadying member Vfast on the depending end ofthe spindle outside the bolster-case.

- .2. The combination, with a bolster, a bolster-case, and a vertical spindle-support therein, of a rotatable spindle sustained by the bolster and said support andv having its lower end projecting below the bolster-case, and a circular steadying member fast on the projecting end of the spindle and independent of the spindle-supporting means.

3. The combination, with a bolster, a bolster-case therefor open at its lower end, and a 'tubular spindle-step Xedly held in the open end of the bolster-case, of a rotatable spindle extended through the bolster and step and projecting below the bolster-case, a steadying member fast on the projecting end of the spindle, and a shoulder on the latter to seat upon the upper end of the spindlestep, the depending end of the spindle being free to move laterally in the step as the spindle centers itself.

4. The combination, With a case open at its lower end, a tubular spindle step fixed therein, and a lateral bearing for the spindle Within the case, of a rotatable spindle having its depending pintle extended freely through and projecting beyond the step,l a steadying member fast on the pintle below the bottom of the ease, and an annular shoulder on the spindle to rest upon the top of the step.

5. The combination with a rotatable spindle, of means to support the same laterally and vertically, and a steadying member fast on the rigid portion of the spindle below its lateral support, to properly center tlle spindle and minimize vibrational movement thereof. l

6. The combination with a rotatable spindle, a case, and means within [lie case to laterally and vertically support the spindle7 the rigid pintle of the latter extending downward below such supporting means, ol a steadying member mounted on the lower end of the pintle.

In testimony whereof, l have signed my name to this specification, in tbe presonre ol' two subscribing witnesses.

JOHN V. UUNN] FF.

Vllitnesses Sr. W. ASHTON, (l. S. PRIEST. 

